Work Instructions After Disconnecting the Battery

Note:
- In order to avoid triggering the alarm siren (installed on right next to the battery) of vehicles with M 536, the battery must be disconnected with the ignition on.
- All loads must be switched off beforehand.
- Never disconnect battery with engine running.
- Never start engine without securely connected battery.
- Do not use a boost charger to start the engine.
- Whenever possible, use jump leads with overvoltage protection.
- Always disconnect both battery terminals before carrying out welding work on the vehicle.
- Wiring harness plugs of control modules or other electronic components must be connected or disconnected with the ignition off. Exception: vehicles with the additional equipment M 536 (alarm siren with tilt sensor).